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1using System;
2using System.Collections.Generic;
3using System.ComponentModel;
4using System.Data;
5using System.Drawing;
6using System.Linq;
7using System.Text;
8using System.Threading.Tasks;
9using System.Windows.Forms;
10
11namespace SecondApp1 {
12
13    class User {
14        // Data
15
16        public string email;
17        public string password;
18
19
20        // Methods
21    }
22
23    public partial class Form1 : Form {
24
25        // Data  -----------------------------------
26        User[] users;
27
28
29        // Methods ---------------------------------
30
31        //Constructor
32        public Form1() {
33            // Creates UI (Buttons, Labels, Textboxes)
34            InitializeComponent();
35
36            ClearErrorMessages();
37
38            // Create test user
39            // Local variable
40
41            // TestUser 1
42            User testUser = new User();
43            testUser.email = "123.123@asd.hu";
44            testUser.password = "12345";
45
46            // TestUser 2
47            User testUser2 = new User();
48            testUser2.email = "321.321@asd.hu";
49            testUser2.password = "12345";
50
51            users = new User[2];
52            users[0] = testUser;
53            users[1] = testUser2;
54
55        }
56        // EventHandler
57        private void loginBTN_Click(object sender, EventArgs e) {
58
59            // Collecting inputs
60            string email = emailTB.Text;
61            string password = passwordTB.Text;
62
63            // Clear error messages
64            ClearErrorMessages();
65
66            // Popup = IntelliSense
67
68            // Email test
69
70            if (email == string.Empty) {
71
72                emailErrorLB.Text = "Email is required!";
73
74            } else if (!email.Contains('@')) {
75
76                emailErrorLB.Text = "Email must contain an @(at) sign!";
77
78            } else if (email.Length < 5) {
79
80                emailErrorLB.Text = "Email is too short!";
81
82            } else if (!email.EndsWith(".hu")) {
83
84                emailErrorLB.Text = "Email must end with (.hu)!";
85
86            }
87
88
89            // Password Test
90
91
92            if (password == string.Empty) {
93                pwErrorLB.Text = "Password is required!";
94
95            } else if (password.Length < 5) {
96
97                pwErrorLB.Text = "Password is too short!";
98
99            }
100
101
102            if (emailErrorLB.Text == string.Empty && pwErrorLB.Text == string.Empty) {
103
104                // Find out the user's name
105
106                // 1st method
107                //string name = email.Substring(0, email.IndexOf('@'));
108
109
110                // 2nd method
111                // alma@gmail.com@asdjaskld@akljdfasj
112                // 0. alma
113                // 1. gmail.com
114
115                //char[] firstInChar = firstName.ToCharArray();
116
117                string fullName = email.Split('@')[0];
118
119
120                string[] nameArray = fullName.Split('.');
121                string firstName = nameArray[0];
122                string lastName = nameArray[1];
123
124
125
126
127                if (nameArray.Length == 2) {
128
129                    firstName = nameArray[0];
130                    lastName = nameArray[1];
131
132                } else if (nameArray.Length == 1) {
133
134                    firstName = nameArray[0];
135                    lastName = "";
136
137                }
138
139
140                // Nake first letter capital
141
142                if (nameArray.Length > 1) {
143
144                    firstName = firstName[0].ToString().ToUpper() + firstName.Substring(1);
145                }
146                if (nameArray.Length == 2) {
147                    lastName = lastName.First().ToString().ToUpper() + lastName.Substring(1);
148                }
149
150
151                // Check if the user is in the users array
152
153                //Code snippet
154
155                int index = 0;
156                bool isFound = false;
157                do {
158
159                    if (users[index].email == email && users[index].password == password) {
160
161                        isFound = true;
162                    }
163
164                    index++;
165                } while (!isFound && index < users.Length);
166
167
168                // For tag Ctrl K + Ctrl + C/U
169                // User is in the DB
170
171                if (isFound) {
172
173                    MessageBox.Show("Welcome, " + firstName + " " + lastName + "!");
174
175                } else {
176
177                    MessageBox.Show("Wrong email or password");
178                }
179
180
181
182
183            }
184
185        }
186
187        private void ClearErrorMessages() {
188            emailErrorLB.Text = "";
189            pwErrorLB.Text = string.Empty;
190        }
191
192
193
194    }
195}